16. Avoid, in conversation all subjects which can injure the absent. A gentleman will never calumniate or listen to calumny.

17. The wittiest man becomes tedious and ill-bred when he endeavors to engross entirely the attention of the company in which he should take a more modest part.

18. Avoid set phrases, and use quotations but rarely. They sometimes make a very piquant addition to conversation, but when they become a constant habit, they are exceedingly tedious, and in bad taste.

19. Avoid pedantry; it is a mark, not of intelligence, but stupidity.

20. Speak your own language correctly; at the same time do not be too great a stickler for formal correctness of phrases.

21. Never notice it if others make mistakes in language. To notice by word or look such errors in those around you is excessively ill-bred.